Quad carb setup information help

rod7515 said

Bewy, I went back and reread the article from holley and I think I had it backwards. Am I right in going to a 7.5 or 8.5 to open the valve earlier.
Also I ordered some blank Air bleeds in 3 sizes. 6/32, 8/32 and 10/32. I got drills add taps to change and add them. I will do the power valve first.
Let me know if I’m on the right track.
Thanks Rod

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Yes, the higher the number the sooner it opens. If you want to change how much fuel is added when it opens that’s controlled by the two holes behind the power valve. If they are not already threaded, they need to be. 8-32 is the size I use. Once you get your primary main jetting correct for CRUISE, you leave those alone.

If you need to add or subtract fuel (on the primary side) you do that with the power valve channel restricters.

Once you get a handle on the power valve, how it actually works and how to use it you’ll be able to out tune all your buddies.